User Guide

--23--
2. Never touching the printed wordings with your
fingers: When you pull out the tube, try not to touch
the printed wordings with your fingers, because if
that’s an earlier-designed tube, the wordings on
tube would be easily rubbed off after few times
touching.
3. Inappropriate pulling angle: Most of the tube basement
could be a little bit tight, but remember not to pull them
too hard bilaterally, for this could break the vacuum seal
and ruin the tube.